From owner-freebsd-virtualization@freebsd.org Wed Apr 28 18:56:32 2021 Return-Path: Delivered-To: freebsd-virtualization@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 526F05FDA74 for ; Wed, 28 Apr 2021 18:56:32 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 4FVnsr1gFdz3FSN for ; Wed, 28 Apr 2021 18:56:32 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 377565FDA73; Wed, 28 Apr 2021 18:56:32 +0000 (UTC) Delivered-To: virtualization@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 373F85FDAAE for ; Wed, 28 Apr 2021 18:56:32 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FVnsr10Wrz3FSv for ; Wed, 28 Apr 2021 18:56:32 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 13B7F13781 for ; Wed, 28 Apr 2021 18:56:32 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 13SIuWiD010018 for ; Wed, 28 Apr 2021 18:56:32 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 13SIuWWV010017 for virtualization@FreeBSD.org; Wed, 28 Apr 2021 18:56:32 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 216759] [kern] Memory speed with small blocks (1K) up to 35 times slower than host system (under QEMU emulation, but not only) Date: Wed, 28 Apr 2021 18:56:30 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 13.0-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: dim@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: virtualization@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: "Discussion of various virtualization techniques FreeBSD supports." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Apr 2021 18:56:32 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216759 Dimitry Andric changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |dim@FreeBSD.org --- Comment #22 from Dimitry Andric --- With https://reviews.freebsd.org/D29733 applied on top of 13.0-RELEASE, run= ning a FreeBSD guest on Ubuntu 18.04.3 LTS, with qemu-kvm 1:2.11+dfsg-1ubuntu7.1= 9, I see the following difference in sysbench results: --- sysbench-acpi-fast.txt 2021-04-28 20:40:05.529460000 +0200 +++ sysbench-kvmclock.txt 2021-04-28 20:33:52.083953000 +0200 @@ -21,28 +21,28 @@ Done. -Total operations: 524288 (66548.67 per second) +Total operations: 524288 (2142666.15 per second) -512.00 MiB transferred (64.99 MiB/sec) +512.00 MiB transferred (2092.45 MiB/sec) General statistics: - total time: 7.8730s + total time: 0.2397s total number of events: 524288 Latency (ms): min: 0.00 - avg: 0.01 - max: 0.85 - 95th percentile: 0.01 - sum: 2644.91 + avg: 0.00 + max: 0.03 + 95th percentile: 0.00 + sum: 101.93 Threads fairness: events (avg/stddev): 524288.0000/0.00 - execution time (avg/stddev): 2.6449/0.00 + execution time (avg/stddev): 0.1019/0.00 DEBUG: Verbose per-thread statistics: -DEBUG: thread # 0: min: 0.0000s avg: 0.0000s max: 0.0008s events: 524288 -DEBUG: total time taken by event execution: 2.6449s +DEBUG: thread # 0: min: 0.0000s avg: 0.0000s max: 0.0000s events: 524288 +DEBUG: total time taken by event execution: 0.1019s --=20 You are receiving this mail because: You are the assignee for the bug.=